Coal breaking mechanism



Oct. 6, 1942. R. M. BARR 2,298,027

com. BREAKING MEGHANISM Filed oct. 2., 1941A 2v sheets-sneer 1 Oct. 6, 1942. RIM. BARR 2,298,027

GOAL BREAKING MEGHANISM Filed oct. 2, 1941 2 sheets-www2 Patented Oct. 6, 1942 UNITED sir-vree eATENT oFF ooAi. BREAKING MECHANIsM 5 Robert M. Barr, Fort smith, Ark. Application October 2, 1941, Serial No. 413,375

t (o1. ssa- 52) 3 Claims.

lThis invention relates generally to improvements in colliery machinery and pertain particularly to a machine for reducing the size of lumps of coal to a desired proportion.

Coal as brought from the mine is in large part made up of very large lumps which are sometimes as much as thirty inches wide. This coal goes through a shaker where the lumps are reduced to sizes of desired proportions. It has up until the present time been the practice at various mines to employ men to reduce the sizes of the lumps in the shaker by the use of picks and this results inthe formation of a large quantity of ne coal or slack which the mine operators desire to avoid since there is already a larger quantity than is desired in the coal as mined.

The present invention comprises a machine which operates over the shaker to break down the lumps of coal on the shaker to a desired size with the formation of a minimum amount of slack.

Another object of the invention is to provide a machine for reducing the lumps of coal on the screens to a desired size by the employment of picks or chisels which are pressed against the lumps of coal to break the same without producing an excessive amount of chips or small particles.

The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying I drawings, it being understood, however, that the invention is not to be considered as limited by the specific illustration or description but that such illustration and description constitutes a preferred embodiment of the invention.

In the drawings:

Fig. 1 is a sectional view taken transversely on line I-I of Fig. 2 showing in elevation over the screens the breaker machine embodying the present invention.

Fig. 2 is a vertical section taken substantially on the line 2-2 of Fig. 1.

Fig. 3 is a sectional view taken vertically substantially on the line 3-3 of Fig. 1.

Referring now more particularly to the drawings the shaker screen structure is indicated generally by the reference character S, this screen structure being of usual well-known design which includes the side plates or walls I0.

Located in a horizontal plane above the i shaker screen and extending longitudinally thereof, substantially directly over the side walls I0 are pairs of beams II while disposed between the pairs of beams II are longitudinally extending spaced beams I2.

These beams function as supporting -means for the breaking machine about to be described.

Each pair of beams I I supports a pair of spaced bearings I3 which are aligned transversely of the beams and which in turn support a short horizontal shaft I4. Each' of the shafts I4 has connected therewith between the bearings I3, a depending shaft I5.

Extendirg transversely of the breaker screen and through the side walls I0 thereof is a bar I6 to each outer end of which the lower end of a guide shaft I5 is coupled as indicated at I1.

As is shownin Figs. 2V and 3 there are two of the shafts I4 upon leach pair of lbeams II, the two shafts I4 being spaced apart longitudinally of the beams and consequently there are at each side of the breaking machine two of the depending guide shafts I5 which are attached to the adjacent Vunderlying side Walls` of the breaker screen. Y

Extending transversely of the shaker screen are the two horizontal beams I8 each of which supports a plurality of picks or chisels I9. Each beam I8 is located between a pair of the transversely spaced beams I5 and secured to each end of each beams I8 is a guide sleeve 20 through which the adjacent guide beam I5 passes. Thus the pick or chisel beams I8 are supported for vertical reciprocal movement so that the points of the chisels or picks I9 may be moved downwardly to be forced through lumps of coal on the shaker screen.

Directly above each pick or `chisel beam I 8 is a gear shaft 2I which is supported by the central fbeams I2 through the medium of lbearings 22 and upon the outer end of each shaft 2| is secured a gear 23.

Each of the gears 23 carries upon the outer side thereof an eccentric pin 24 with which is connected one end of a longitudinally adjustable pitman 25. The lower end of each pitman 25 is pivotally connected las indicated at 26 with the Iunderlying pick beam I8.

Extending transversely beneath the fbeams II and I2 and midway between the shaft 2| is a driving shaft `21 which is supported by suitable bearings 28 secured to the undersides of the beams I2 and a bearing 29 secured to the under side of an outer one of one pair of beams II as shown in Fig. 1. This driving shaft carries upon its outer end a pulley 30 and it also carries and has secured thereto the pair of pinions 3| each of which is rotated between and has toothed connection with a pair of adjacent gears 23 as shown in Figs. 2 and 3.

As is also shown in these gures the pitman are coupled with the gea-rs 23 in such a manner that when rotary motion is imparted to these gears by the drive shaft 21 and the pinions 3| the pick bars I8 will Ibe given opposite movement, that is, when one bar is moving upwardly the other one will be moving downwardly.

Any suitable means may be employed for driving the shaft 21 but there is here illustrated, in Fig. 3, an. electric motor 32 supported in a suit.- able manner adjacent; to the pulley '30 and connected with the pulley 30 through the medium of a lbelt 33 which passes around a smaller pulley Y 34 which is coupled with the armature shaft of the motor.

With the machine here described itgwill be seen that the picks or chisels when movedl downwardly against underlying lumps of; cpal'will be pressed through the lumps and consequently will break the same with the formation of less slack than would bethe case in theuse. of handpicks which are driven against thelumps,Wil'sh4 a. force which impartsa pounding-or jarring tothe lumps and Icauses, the formation of many chips.

Fromvv the foregoing it will bey readilyy apparent that the machineherein described will function eiiiciently to. break up large lumps of coal in, the shaker screen and reduce the same to. a desired size` with the formation of a. minimuml of slack and also. it does not require the ser-vices of an attendant asy is required under the present process.

What is claimed is.:

1. A lump material breaker of the.. character described. comprising means for supporting said material, suspended.-x swinging carrier means for said supporting means, a. plurality of pick Blements, a carrier body, for said pick elements ex;- tending transverselyof the material supporting means and having sliding connection with said swinging carrier means whereby theY said. picks are directed downwardly toward the material carrier, and mechanism connected with said pick carrier for effecting the vertical reciprocation of the same upon said carrier means and with respect to the material supporting means.

2. A lump material breaking machine comprising a supporting structure, a lump material carrier disposed beneath the supporting structure, a hanger shaft oscillatably suspended from the supporting structure and coupled with said material carrier at opposite sides of the same, a bar extending transversely of the material carrier and having sliding connection at its ends with said hanger shafts to facilitate its vertical movement, ak plurality of material breaking picks carrier by said bar and extending downwardly toward the material carrier, and mechanism supported bythe supporting structure and operatively coupled with said bars for effecting the reciprocatory movement of the latter and the picks carried thereby;

3. A lump material breaker of the character stated comprising a supporting structure, a. lump material carrier disposed lbeneath the supporting structure', apair of hanger shafts at each side of the material carrier each suspended from said supporting structure for oscillation on, an axis extending transversely of the material carrier, said hanger shafts being pivotallyconnected with the material carrier, a bar extending transversely of and above the material carrier Ibetween each transversely spaced pair of hanger shafts,r aplurality of pick members` carried by each bar and directed downwardly toward' the material carrier, -a vertical tubular guide: secured toeach endof each bar and having a hanger shaft extending therethrough, and power means operatively coupled with each bar for effecting reciprocal movedment of thev same relative to the material' carrier.

ROBERT Ml. BARR. 

